Kreoss over on Deviant art (an FiM Animator from Topdraw) dropped a bit of information on the Derpy change tonight. Apparently we wont be seeing a complete axing of the derp eyes in future episodes.
On the issue on Derpy whether she'll have the same Derp face expression and stuff. As an animator of the show, rest assured, she'll be fine.
He also goes into detail about not pointing fingers and blaming people about this (Something you should all probably listen to!).
Check out his entire message on the Deviant Art page here, or after the break!